FEATURE STATEMENT:
- Introduce linear phase error noise model in Uplink at UE
- Perform common phase error (CPE) estimation and compensation at gNB

SOLUTION:
- A linear phase shift model is introduced in simulation.
- PTRS symbols are used to perform estimation of CPE from DMRS compensated signal
- The estimated values are interpolated in time domain and signal is compensated for the CPE.
- PTRS processing is done in Frequency Domain for each symbol in a slot and
  LLR's are calculated for each symbol accordingly.

IMPLEMENTATION:
* sim.h/channle_sim.c
- Linear Phase Noise Generation model definition.
* nr_ul_channel_estimation.c/nr_ul_estimation.h
- CPE estimation from PTRS and DMRS compensated signal.
* nr_dmrs_rx.c/nr_refsig.h
- Regenerate PTRS symbols at gNB.
* nr_ulsch_demodulation.c
- Removed old PTRS processing code and move to a common PTRS processing function
* defs_gNB.h/init.c
- New PTRS variables definition and initialization
* nr_ulsch_ue.c
- Corrected PTRS parameter to get new PTRS symbols for each OFDM symbol

TESTING
* ulsim.c
- Added Phase noise, Enable PTRS signal and verified the output.

VERIFICATION
- The LLR are rotated back with estimated CPE and no error is observed in scrambling/decoding

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

build improvements: allow build mode selection (-g -G options) allow all exec build in one pass, remove remaining USE_MME macros in nr code

Mainly comestics and integer type management
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

- the new option -k allows to skip the built of shared libraries, rfsimulator
  basicsimulator and transport protocol libraries
- default compilation remains untouched as is still building all libraries
- this option allows to save a massive amount of time when compiling
  repeatedly for debugging purposes

remove RRC_VERSION macros, simplify build-oai and CMakefile.txt accordingly, get rid of remaining compilation warnings (opt module improperly merged and patch asn1c files with tests against max 64 bits integer value)

add channel model option to rfsimulator and prevent common libraries re-compilation when using both --UE --eNB options in build_oai script

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

this commit includes pucch format0 receiver and testbench for pucch format0 without ofdm. Also it has some fixes to pucch_nr.c

More build_oai cleanup, add a generic option "--build-lib" to build optional shared libraries (telnet server for example)

Remove deprecated build options, now available as config options: noS1, basic_simulator. Remove DISABLE_LOG_X macros, disabling logs now available via disabling the T_TRACER

Update doc, remove color escape sequences from logs (use character to identify message level), try to fix basic simu Pb

Fix NB_PATTERN_FILES and BUILD_OPTIONS in oai-ci-vm-tool, remove useless options (-t, basic_simulator, rf_simulator) as corresponding libraries always built

Remove deprecated build options, now available as config options: noS1, basic_simulator. Remove DISABLE_LOG_X macros, disabling logs now available via disabling the T_TRACER

Remove deprecated build options, now available as config options: noS1, basic_simulator. Remove DISABLE_LOG_X macros, disabling logs now available via disabling the T_TRACER